No dropdown options in Column containing event names in EventFlow Chart

[xiangfu0]

There is no drop down options for Column containing event names under Event definition in Visualization Type: Event Flow

Expected results

Expected to see a drop down list with columns

Actual results

It shows no option.

Screenshots

How to reproduce the bug

1. Go to Any Chart
2. Change Visualization Type to 'Event Flow'.
3. Click on Event Definition
4. See error: Column containing event names has 0 Options

Environment

(please complete the following information):

• superset version: master branch
• python version: 3.6.9

Checklist

Make sure these boxes are checked before submitting your issue - thank you!

• I have checked the superset logs for python stacktraces and included it here as text if there are any.
• I have reproduced the issue with at least the latest released version of superset.
• I have checked the issue tracker for the same issue and I haven't found one similar.

Additional context

It works in 0.36 but found in current dev master branch.

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[xiangfu0]

has anyone look into this?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. For admin, please label this issue .pinned to prevent stale bot from closing the issue.

[vnktsh]

I think this Viz is dead. Check below.
williaster/data-ui#201